Poise



C. DOLLACK Aug. 4, 1931.

Filed Oct. 9, 1928 INVENTOR. e, M DMU/k Dl-bha, 0MM- MIM A TTORNEYS.

Patented Aug. 4,1931

UNITED STATES PATENT OFFICE CHARLES DOLLAOK, OF BROOKLYN, NEW YORK, Ass'IGNoR 'ro THE .moons BROS. co., INC., OE BROOKLYN, NEW YORK,r A CORPORATION or NEW YORK POIsE Application led October 9, 1928. Serial No. 311,330.

This invention relates to a functionally and structurally improved poise structure capable of vuse in numerous different associations, but primarily to be employed in conicction with scales of the even-balance type.

Itis an Object of the invention to provide a device of this character, the parts of which will be few in number and rugged and simple in construction and capable of assembly "ly relatively unskilled labor, to furnish an inexpensive article of this nature operatingl over long periods of timewith freedom from mechanical dificulty. i

A further object of the invention is that if furnishingl a device ofv this character which will be locked against accidental shifting in an improved manner and in which such locking may be simply achieved, aside from the fact that the poise will operate freely under normal conditions. i

lVith these and further objects in mind reference is had to the attached sheets of drawings illustrating practical embodiments of the invention and in which Figure l is a fragmentary front elevation of a scale with which there is associated a poise and bar embodying the present invention;

Fig. 2 is a fragmentary enlarged View of yhe poise and rack bar;

Figs. 3 and it are sectional views taken through the bar and showing the poise in locked and unlocked conditions respectively thereon;

Fig. 5 is a View similar to Fig. 3, but showing a slightly different form of locking mechanism;

Fig. 6 is an edge view of the mechanism as 'shown in Fig. 5, and i Fig. 7 shows still a different form of supporting element for use in connection with the poise.

In Figure l there has been generally illustrated a scale and in this view the numeral indicates the scale base, from which a support 1G extends upwardly, this support mounting suitable bearings carrying a beam 17 at the outer ends of which pans and their supporting structure 18 is provided. It is 1 usual, in a scale of this nature, whether it be of thek simple, even-balance type or whetlier it be of the overand underweight7 type, to provide a bar mounting a poise which, when shifted, serves to provide a counter-balance, the value of which is registered 4by graduations appearing upon the face of the bar. Thus, a rack bar 19 has been shown as attached tothe beam 17 and mountsy a poise weight 20 by means of a. suspension member or Chill 21. It is to be observed that the face of the bar has scale marks or subdivisions 22, the value of which may be suitably indicated and that the upper edge of this bar is serrated Vto provide a series of teeth 23 between which the suspension member 21` may rest. Fluthermore, this bar maybe inclined to vertical so that its sub-divisions can be read with facility and, as will be noted in Figure 2, the bearing portion of the suspension member ma have a knifeV edge, the converging faces o which extend at an angle to each other more acute than to thc side faces of the teeth 23. As at consequence it will be appreciated that the chill or suspension member will have a free swinging movement during the oscillation of the beam and'that the poise weight will always remain vertical'below its point of suspension.

Now, with a view to providing means which will prevent a `jumping of the suspension member from a point between two teeth of the bar, a number Of desirable constructions may be employed as, for example, in

Figs. 2 to 4, the opening in the loop providing the suspension member is triangular in shape, with its outer edge inclined-to allow for the inclination of the 'rack bar-and immediately below the opening there. is mounted a slide member 24, by forming this member with a slot 25 through which a headed pin 26l eX' tends. Portions 27 against which the fingers of an operator may bear are furnished at each end of the slide arielv this element carries an'abutment or extension 28 which, when in the position shown in Fig. 3, will. serveto restrict the effective spacedefined by the loop member to such an extent that the bearing edge' ofthe latter cannot be lifted sufliciently clear ofthe bar to move the poise Gii along the same. However, by simply shifting the slide from the position shown in Fig. Ll, space adequate to this end is provided.

In the form of construction shown in Figs. 5 and 6, a lever 29 is provided as a substitute for the construction shown in the preceding figures. rIhis lever has itsI innei end pivotally mounted as at and may have a detent portion 3l for iooperation with a recess to normally retain it in the position shown in itull lines. In this position a jumping or accidental shifting of the poise is prevented, but by simply swinging the lever downwardly to the position shown in dot-ted lines l in F ig. 5, a free movement of the parts is assured.

Finally, with respect to Fig. 7, a construction has been shoivn in which, by means of a spring element fifi bearing against the loiver edge of the rack member, not shown in brackets, an acci iental shitting et the parts is prevented; While, if the poise and suspension member are lifted, the rack member will bear against the spring to permit suiiicient clearance to be established to allov.v of smh shitting.

Frein the foregoing it will be appreciated that. among others, the several objects speciiicallnT aforementioned are achieved. It intended, however, that numerous changes in construction and rearrangement of parts might be resorted to Without departing from the spirit of the invention as defined by the claims.

Having described my invention, What I claim as new and desire to secure by Letters Patent, is

1. A device of the character described including. in combination, a rack bar, a poisesupporting member having an openingl to accommodate said rack bar and suspended therefrom and means movably mounted by said supporting member and shift-able to rc` strict the effective arca ol said opening to iimit the movement ot said supporting member and poise With respect to said rack bar.

2. A device of the character described .including, in combination, a rack bar, a poisesupporting member having an opening to accommodate said rack bar and suspended ther-strom and means associated with said supporting member and extendable into the opemng thereofA to a point adjacent said rack ba r. whereby to restrict the effective area of said opening and limit the movement of said supporting member with respect to said bar.

n device of the character described including, in combination, a rack bar having a serrated upper edge, a supporting member formed with an opening for the accommodation of said bar and the upper edge of said opening cooperating with the serrated portion of said bar, and means movably carried by said supporting member and extending adjacent the lower portion of the opening thereof and the lower edge of said bar, said means being spaced from said bar a depth less than the depth of the serrated portions and being shiftable to permit of said supporting member being moved to clear the serrations of said bar.

et. In combination a rack bar formed with a serrated upper edge, a supporting member formed with an opening for the accommodation of said bar and means movably carried by said supporting member and shiftable across said opening at a point immediately7 adjacent the lower edge of said bar to prevent accidental movement of the supporting member with respect to the bar.

5. In combination a rack bar formed Wit-h a. serrated upper edge, a supporting member formed with an opening for the accommodation of said bar and a locking element movably carried by said supporting member and shiftable with respect thereto to extend into a position restricting the arca of such opening and extending adjacent the lower edge of said. bar.

6. In combination a. rack bar, a supporting member formed with an opening for the accommodation of said bar and a lockingY element formed with an abutment, said element being shiftably mounted by said member to have its abutment extend across said openinfT and adjacent the lower edge of said bar.

n testimony whereof I affix my signature.

CHARLES DOLLACK. 

